Well to start with not that appealing of a subject, still that can still make a good photo.
In this case the technical quality of the photo is not all that it could be. I am not sure B/W was a good choice as it makes the mouse blend in with the rug a bit. Also looking at this photo give me the feeling of a photo that has faded.
I hate it when they do that!!!
I wouldn't realy want to hang this on my wall. Seems more a snap shot than a stroke of photographic genius. However I didn't even enter this challenge so good luck.
Is that a dead mouse? Yuck! Cat is overexposed; the carpet is hard to look at, the mouse blends in with the background. The image as a whole is too flat. In any event, the connection to the theme is not that well demonstrated. Yes, a cat is stronger and more powerful than a mouse, and in that way perhaps this captures the theme. But we can't see the cat's expression, for instance, which would help.
Cute title, but technically not a wonderful picture... I would imaging that you were not particularly inclined to pick up the mouse and place it in a more appealingly photogenic location, but it might have been worth trying to find a volunteer to do it as the environment is a little uninspiring. I different viewpoint might have been worth exploring; seeing fluffy's face instead of its arse would improve composition, methinks. Colour would have been my preference (might make the cat more distinctive against the skirting), as would a bit more focus on the corpse. had potential, is a good idea, could do with a little post editting (such a noise reduction with neatimage).